package com.zut.filter;

import com.alibaba.fastjson.JSON;
import com.zut.common.BaseContext;
import com.zut.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter(filterName = "loginCheckFilter",urlPatterns = "/*")
@Slf4j
public class LoginCheckFilter implements Filter {

    public static final AntPathMatcher PATH_MATCHER = new AntPathMatcher();
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        Filter.super.init(filterConfig);
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
         String requestUrl = request.getRequestURI();
        //不需要处理的请求路径
         String[] urls=new String[]{
                 "/employee/login",
                 "/employee/logout",
                 "/backend/**",
                 "/front/**",
                 "/common/**",
                 "/user/sendMsg",
                 "/user/login",

         };
         //判断是否需要处理
        if(check(requestUrl,urls)){
            log.info("本次请求{}不需要处理",requestUrl);
            filterChain.doFilter(request,response);
            return;
        }
       if( request.getSession().getAttribute("employee")!=null){
           log.info("用户已登录,{}",request.getSession().getAttribute("employee"));
           Long empId=(Long)request.getSession().getAttribute("employee");

           BaseContext.setCurrentId(empId);
           filterChain.doFilter(request,response);
           return;
       }
        if( request.getSession().getAttribute("user")!=null){
            log.info("用户已登录,{}",request.getSession().getAttribute("user"));
            Long empId=(Long)request.getSession().getAttribute("user");

            BaseContext.setCurrentId(empId);
            filterChain.doFilter(request,response);
            return;
        }
       log.info("用户未登录");
       response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));
       return;
    }

    @Override
    public void destroy() {
        Filter.super.destroy();
    }


    public boolean check(String requestURI,String[] urls){
        for (String url : urls) {
            boolean match = PATH_MATCHER.match(url, requestURI);
            if(match){
                return true;
            }
        }
        return false;
    }
}
